Method and apparatus for supporting mobility of terminal

Abstract

A method of a terminal may comprise: receiving, from a satellite, cell information of a terrestrial network operator with which the terminal is registered; determining whether the terminal exists within a cell of the terrestrial network operator based on the cell information; and measuring the cell of the terrestrial network operator based on that the terminal exists within the cell of the terrestrial network operator.

What is claimed is: 
     
         1 . A method of a terminal, comprising:
 receiving, from a satellite, cell information of a terrestrial network operator with which the terminal is registered;   determining whether the terminal exists within a cell of the terrestrial network operator based on the cell information; and   measuring the cell of the terrestrial network operator based on that the terminal exists within the cell of the terrestrial network operator.   
     
     
         2 . The method of  claim 1 , wherein the cell information includes cell coverage information of the terrestrial network operator, and the determining of whether the terminal exists within the cell of the terrestrial network operator comprises:
 acquiring a current location of the terminal; and   determining whether the current location of the terminal is included in the cell of the terrestrial network operator based on a reference location and a radius distance of the cell coverage information.   
     
     
         3 . The method of  claim 1 , wherein the cell information includes cell frequency information of the terrestrial network operator, and the measuring of the cell of the terrestrial network operator comprises: measuring the cell of the terrestrial network operator based on the cell frequency information. 
     
     
         4 . The method of  claim 1 , further comprising: periodically repeating an operation of determining whether the terminal exists within the cell of the terrestrial network operator based on that the terminal does not exist within the cell of the terrestrial network operator. 
     
     
         5 . The method of  claim 1 , further comprising:
 determining whether a cell reselection condition is satisfied based on a measurement result for the cell of the terrestrial network operator; and   camping on the cell of the terrestrial network operator based on that the cell reselection condition is satisfied.   
     
     
         6 . The method of  claim 5 , wherein the determining of whether the cell reselection condition is satisfied comprises:
 measuring a signal reception strength of each of a non-terrestrial network cell and the cell of the terrestrial network operator; and   determining satisfaction of the cell reselection condition based on that the signal reception strength of the cell of the terrestrial network operator is greater than the signal reception strength of the non-terrestrial network cell.   
     
     
         7 . The method of  claim 5 , wherein the determining of whether the cell reselection condition is satisfied comprises:
 comparing frequency priorities of the non-terrestrial network cell and the cell of the terrestrial network operator; and   determining satisfaction of the cell reselection condition based on that the frequency priority of the cell of the terrestrial network operator is higher than the frequency priority of the non-terrestrial network cell.   
     
     
         8 . The method of  claim 1 , further comprising:
 receiving, from the satellite, a measurement configuration message;   reporting, to the satellite, a measurement result for the cell of the terrestrial network operator based on the measurement configuration message;   receiving, from the satellite, a handover instruction determined based on the measurement result; and   performing a handover from the satellite to a base station of the terrestrial network operator based on the handover instruction.   
     
     
         9 . The method of  claim 8 , further comprising:
 measuring a cell of another terrestrial network operator overlapping with the cell of the terrestrial network operator based on the measurement configuration message;   reporting, to the satellite, measurement results for the cell of the terrestrial network operator and the cell of another terrestrial network operator;   determining whether a handover condition is satisfied based on the handover instruction received from the satellite; and   performing a handover from the satellite to a base station of one of the terrestrial network operator and the another terrestrial network operator based on satisfaction of the handover condition and based on the handover instruction.   
     
     
         10 . The method of  claim 9 , wherein the determining of whether the handover condition is satisfied comprises:
 measuring a signal reception strength of each of the cell of the terrestrial network operator and the cell of another terrestrial network operator cell; and   determining satisfaction of the handover condition based on that the signal reception strength of the cell of the terrestrial network operator is greater than the signal reception strength of the another terrestrial network operator cell.   
     
     
         11 . A terminal comprising at least one processor, wherein the at least one processor causes the terminal to perform:
 receiving, from a satellite, cell information of a terrestrial network operator with which the terminal is registered;   determining whether the terminal exists within a cell of the terrestrial network operator based on the cell information; and   measuring the cell of the terrestrial network operator based on that the terminal exists within the cell of the terrestrial network operator.   
     
     
         12 . The terminal of  claim 11 , wherein the cell information includes cell coverage information of the terrestrial network operator, and in the determining of whether the terminal exists within the cell of the terrestrial network operator, the at least one processor causes the terminal to perform:
 acquiring a current location of the terminal; and   determining whether the current location of the terminal is included in the cell of the terrestrial network operator based on a reference location and a radius distance of the cell coverage information.   
     
     
         13 . The terminal of  claim 11 , wherein the cell information includes cell frequency information of the terrestrial network operator, and in the measuring of the cell of the terrestrial network operator, the at least one processor causes the terminal to perform: measuring the cell of the terrestrial network operator based on the cell frequency information. 
     
     
         14 . The terminal of  claim 11 , wherein the at least one processor further causes the terminal to perform: periodically repeating an operation of determining whether the terminal exists within the cell of the terrestrial network operator based on that the terminal does not exist within the cell of the terrestrial network operator. 
     
     
         15 . The terminal of  claim 11 , wherein the at least one processor further causes the terminal to perform:
 determining whether a cell reselection condition is satisfied based on a measurement result for the cell of the terrestrial network operator; and   camping on the cell of the terrestrial network operator based on that the cell reselection condition is satisfied.   
     
     
         16 . The terminal of  claim 15 , wherein in the determining of whether the cell reselection condition is satisfied, the at least one processor causes the terminal to perform:
 measuring a signal reception strength of each of a non-terrestrial network cell and the cell of the terrestrial network operator; and   determining satisfaction of the cell reselection condition based on that the signal reception strength of the cell of the terrestrial network operator is greater than the signal reception strength of the non-terrestrial network cell.   
     
     
         17 . The terminal of  claim 15 , wherein in the determining of whether the cell reselection condition is satisfied, the at least one processor causes the terminal to perform:
 measuring a signal reception strength of each of a non-terrestrial network cell and the cell of the terrestrial network operator; and   determining satisfaction of the cell reselection condition based on that the signal reception strength of the cell of the terrestrial network operator is greater than the signal reception strength of the non-terrestrial network cell.   
     
     
         18 . The terminal of  claim 11 , wherein the at least one processor further causes the terminal to perform:
 receiving, from the satellite, a measurement configuration message;   reporting, to the satellite, a measurement result for the cell of the terrestrial network operator based on the measurement configuration message;   receiving, from the satellite, a handover instruction determined based on the measurement result; and   performing a handover from the satellite to a base station of the terrestrial network operator based on the handover instruction.   
     
     
         19 . The terminal of  claim 18 , wherein the at least one processor further causes the terminal to perform:
 measuring a cell of another terrestrial network operator overlapping with the cell of the terrestrial network operator based on the measurement configuration message;   reporting, to the satellite, measurement results for the cell of the terrestrial network operator and the cell of another terrestrial network operator;   determining whether a handover condition is satisfied based on the handover instruction received from the satellite; and   performing a handover from the satellite to a base station of one of the terrestrial network operator and the another terrestrial network operator based on satisfaction of the handover condition and based on the handover instruction.   
     
     
         20 . The terminal of  claim 19 , wherein in the determining of whether the handover condition is satisfied, the at least one processor causes the terminal to perform:
 measuring a signal reception strength of each of the cell of the terrestrial network operator and the cell of another terrestrial network operator cell; and   determining satisfaction of the handover condition based on that the signal reception strength of the cell of the terrestrial network operator is greater than the signal reception strength of the another terrestrial network operator cell.